Throttling device for marine engines.



0. J. MoGOWAN. THROTTLING DEVICE FOR MARINE ENGINES.

APPLICATION FILED NOV. 15, 1910.

Patented Sept. 12, 1911.

INVENTOR Owe/AIM? 501M011 ATTORNEYS coLnmuM PLANOGRAPII CD.,WASI|INOTON. iL-g",

UNITED STATES PATENT OFFICE.

OWEN J. MCGOWAN, OF NEW YORK, N. Y.

THROTTLING DEVICE FOR MARINE ENGINES.

T 0 all whom it may concern:

Be it known that I, OWEN J. MoGowAN, a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented a new and 1mproved Throttling Device for Marine Engines, of which the following is a full, clear, and exact description.

Among the principal objects which the present invention has in view are: to provide means for shutting off the steam supply of an engine when a sea-going vessel is lifted by the waves to the position commonly termed pitching; to provide a rocking valve operable by the swing of the hull of the vessel relative to a constant vertical member; and to provide a simple, eflicient and durable mechanism for throttling the steam supply main of a marine engine.

One embodiment of the present invention is disclosed in the accompanying drawings, in which like characters of reference denote corresponding parts in both views, and in which Figure 1 is a side elevation of a throttle valve and operating mechanism therefor, constructed and arranged in accordance with the present invention; and Fig. 2 is a vertical section taken on the line 2'2 in Fig. 1.

The valve casing 7 is provided with bolting flanges 88, by which it is secured to the sections 9-9 of the steam supply mains. The casing is provided with a cover 10, which is bolted by means of bolts 1111 over the casing, and is provided with a bearing boss 12. The boss 12 is elongated, as shown best in Fig. 2 of the drawings, to provide a bearing for a shaft 13. The shaft 13 is provided with a second bearing formed in a boss 14 on the casing 7. The shaft 13 has mounted thereon a rotary valve member 15. The valve member 15 is provided with peripheral grooves 16 disposed in parallel arrangement and provided to prevent the total cut-off of steam by the valve. It is essential that under no circumstances shall the steam be totally out off in the mains 9, as in that event the engine is arrested and would require to be manually manipulated to start it once stopped.

The boss 12 is extended toward the bulk head in the engine room to permit the weight 17 of a pendulum 18 to swing free in the passage between the engine and the said bulkhead. The pendulum 18 is pro- Specification of Letters Patent.

Application filed November 15, 1910.

Patented Sept. 12, 1911.

Serial No. 592,431.

vided with an elongated slot 19 to receive the projected end 20 of a crank 21. The crank 21 is fixed by means of a nut 22 upon the shaft 13. To lock the crank 21 and shaft 13 connected therewith upon the boss 12, a hollow collar 23 is provided. The pendulum 18 is suspended from an overhead structural beam 24, by means of a bracket 25 which is bolted to the beam 24, as shown in the drawings. The bracket 25 is bifurcated and provided with a rivet to form a pivot pin for the pendulum 18.

To stiffen the construction of the pendulum 18 laterally to prevent the bend or whip of the same, a truss bar 27 is provided, which bar is fixed rigidly to the pendulum 18 by means of rivets 28, 28. The bar 27 is sprung over the struts 29, 29. The struts 29, 29 are hollow tubes through which are passed long rivet bolts 30, 30.

The relative length of the crank 21 and the sections of the pendulum 18 above and below the slot 19 is a matter of calculation. Upon the ratio between the crank 21 and that portion of the pendulum 18 above the slot 19 depends the rapidity of action of the valve 15.

The operation of a valve and operating mechanism therefor constructed and arranged as above described is as follows: The crank 21 being secured in the slot 19, and the pendulum 18 being pivoted, as shown in the drawings, to swing toward the bow of the vessel only, being prevented from swinging toward the stern of the vessel by the strut 31, the said crank is carried over the full quarter are when the pendulum 18 is moved through an arc of much less de gree. The required are of the pendulum 18 is dependent 011 the ratio above mentioned of the crank 21 and the length of the pendulum 18 above the connection with the said crank. As the pendulum 18 swings to the position shown in dotted lines in Fig. 1 of the drawings, it will be seen that the end 20 of the crank is carried to the position shown in said figure, where the valve 15 is thrown completely over the opening of the main 9. Although disposed in this position, s-uflicient steam passes through the grooves 16 to supply enough steam to prevent the stoppage of the cylinders. It will be understood that for all degrees intermediate the extremes shown by dot-ted and full lines in Fig. 1 of the drawings, the valve 15 will be moved proportionately to the angle at which the pendulum 18- is thrown. The quadrant 32 is bolted to the cover 10 to hold in guiding relation the arm 33 .of the crank 21.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is p A throttling device for marine engines, comprising a cylindrical valve casing interposed between sections of a steam supply main; arotary valve mounted in said casing, said valve being provided with means for preventing the complete stoppage of steam flow by said valve; a crank member fixedly connected with said valve and extending below the center of rotation thereof; a pendulum pivoted to the fixed structure of a vessel above said valve and provided with an elongated slot extending from the center of said valve casing below the same to a length approximately equal to the length of said crank member; a weight-- ed member fixedly secured to the lower end of said pendulum; and means for slidingly connecting the said crank and pendulum.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

OWEN J. MCGOWAN.

Witnesses:

WILLIAM F. FoIs'r, JAMES J. SHARP.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. C. 

